package Desort;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

import java.io.IOException;

public class FirstIndexReducer extends Reducer<Text, IntWritable,Text,IntWritable> {
    @Override
    protected void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
        //统计数量
        /**
         * yyb--a.txt 5
         * Tom_255--a.txt 9
         * ....
         */
        int count = 0;
        for(IntWritable value: values){
            count+=value.get();//0+1+1+1+..
        }
        context.write(key,new IntWritable(count));
    }
}
